v0.17.2

Changes:

• tf.random_normal and tf.random_uniform work now (Nuance: tf.random_normal works on Radeon, but fails on NVIDIA, currently)
• a few other operations enabled, such as as slicing, aggregation, concat, gather enabled
• Adam works now (needed random implemented in order to work)
• softmax works
• runs on both Ubuntu 16.04 (tested on NVIDIA) and on Mac Sierra (tested on Radeon Pro 450)
• multilayer_perceptron.py runs ok now :-)